Shocking camera footage shows an elderly man who suffers from Alzheimer’s disease being beaten by a care worker at a Canadian nursing home. The family of 89-year-old Georges Karam installed the surveillance cameras in his room at Ottawa’s Gary J. Armstrong Long Term Care Home after noticing several unexplained injuries to their loved one. Police arrested personal care worker Jie Xiao in connection with the incident and charged him with assault.

“In the fall of 2016 and early 2017, my grandfather kept suffering from bruises, cuts and lesions — mostly to his face,” Karam’s grandson Daniel Nassrallah told CBC Radio-Canada. “Sometimes the home would have answers saying he fell out of bed, [but] my grandfather is immobile, so we didn't necessarily believe [that].” With the approval of the Armstrong Home’s management and the knowledge of staff, the family installed the camera, which Nassrallah said was “extremely visible.”

Karam suffers from Alzheimer’s and Parkinson’s diseases, both debilitating conditions, leaving him largely immobile. The incident occoured on March 8, after Karam feebly tried to hit Xiao while he changed his diaper. Xiao then struck the elderly man 11 times in the head and side of the face. At other times he can be seen holding his raised first up to Karam’s face and appears to threaten him. The entire assault lasted about 28 seconds, according to the Ottawa Sun.

Xiao pleaded guilty to assault last Tuesday and will be sentenced later this year. The facility where the assault occurred is run by the city of Ottawa, and in a letter to the mayor and city council, general manager of community and social services Janice Burelle said, "I deeply regret that one of our residents was subjected to this incident. Rest assured, the safety and well-being of all of our residents is our number one priority."